The invention discloses a manual control type
camel hair chenopodium album seed harvesting device which comprises a collecting part used for harvesting seeds from stock plants, a grading part used for grading the harvested seeds according to the weight is arranged at one end of the collecting part, and an
impurity removing part used for pretreating the seeds before grading is arranged in the grading part; according to the seed grading device, a directional
airflow field is formed through an L-shaped channel, a symmetrical and staggered distribution mode of the collecting pieces is combined, accurate grading is achieved through
kinetic energy differences of seeds of different weights, and the differentiated requirements of different scenes such as breeding and ecological restoration for the seed quality are met; seeds are prevented from impacting and damaging seed coats, the seeds can be guided to accurately gather into the collecting groove, the inclined guiding of the flow guide block in the collecting cavity is matched, it is ensured that the seeds are smoothly discharged from the discharging
pipe without residue accumulation, fine light impurities in secondary screening can be synchronously removed through a negative pressure adsorption structure of the ox horn type guide block and the
air pump, the purity of the graded seeds is improved, and the quality of the graded seeds is improved. And subsequent treatment procedures are reduced.